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Sigma 15mm ƒ/2.8 EX ED Diagonal Fisheye Underwater

Being able to get within a few inches of your subject can drastically improve the sharpness and contrast of your photos. The Sigma 15mm fisheye allows you to do just that. A giant kelpfish at home amongst the algae at Catalina Island, CA. Nikon D810, Sea & Sea housing, dual Ikelite strobes. 1/80, ƒ/13, ISO 400.

The Sigma f/2.8 15mm fisheye (Sigma 15mm f/2.8 EX DG Diagonal Fisheye) is considered by many as the go-to fisheye lens for full-frame Nikon underwater shooters. Its minimum focus distance of fewer than 6” and its 180º diagonal field of view makes it a great lens for shooting underwater. The Sigma 15mm performs very well behind 8 or 9 inch dome ports, as well as smaller domes like the Nauticam 140mm. It should be noted that this lens will work behind the popular 100mm Zen mini dome, but part of the lens shade will have to be removed. Whether you are shooting seascapes, split shots, or close-focus wide-angle, the Sigma 15mm fisheye is something you should have in your kit if you shoot a full-frame Nikon DSLR.

Having a wide-angle lens that has a very close focusing distance and a wide field of view can help an underwater photographer create very dynamic photographs. Red gorgonian sea fans line deep channels at Sutil Island, a small island near the coast of Santa Barbara Island, California. 1/160, ƒ/9, ISO 320.

The wide, 180º field of view at 15mm on full frame makes the Sigma an ideal lens for splits. Giant-spined sea star under the Newport Pier. Newport Beach, California. 1/50, ƒ/13, ISO 640

Michael Zeigler is a contributor, instructor, and trip leader for Samy’s Underwater Photo & Video, as well as an AAUS Scientific Diver. More of Michael’s underwater photography can be seen at www.seainfocus.com. For the latest information on workshops and trips, sign up for our newsletter